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1. 发明专利

JPH05344385A 失效
公开(公告)号：JPH05344385A
公开(公告)日：1993-12-24
申请号：JP14962892
申请日：1992-06-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ENOMOTO YASUHIRO , OZASA MASAYUKI , AKIYAMA KAZUO
IPC分类号： H04N5/208
摘要： PURPOSE:To clarify the contour of a picture projected on a screen by emphasizing the both front and back edges of a luminance signal. CONSTITUTION:A processing circuit for generating an edge emphasis signal from the luminance signal is divided into two routes, a front edge emphasis signal is generated at the first route and a back edge emphasis signal is generated at the second route. Both signals are added at an adder 6, a front/back edge emphasis signal is formed and the front/back edge emphasis signal and the luminance signal delayed at a delay circuit 9 are added and synthesized at the adder 10. The first route is constituted of a high-pass filter 2 for extracting the high-pass components of the luminance signal and the second route is constituted of the delay circuit 3 for delaying the luminance signal and the high-pass filter 4 for extracting the high-pass components of the output signal of the delay circuit.

2. 发明专利

JPH02277384A LUMINANCE SIGNAL PROCESSING CIRCUIT FOR MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH02277384A
公开(公告)日：1990-11-13
申请号：JP9822689
申请日：1989-04-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： AKIYAMA KAZUO , HAYASHI TAKAHARU , TAMAGAWA NOBUYUKI
IPC分类号： H04N5/922 , G11B20/02 , H04N5/92
摘要： PURPOSE:To prevent the malfunction of a synchronizing separator circuit occurring by locating a high-pass filter circuit and a limiter circuit of detail enhanser system at the rear stage of a clamping circuit, and applying the output signal of the clamping circuit on the synchronizing separator circuit via a second low-pass filter circuit. CONSTITUTION:A first LPF circuit 4 is connected to an adder circuit 6 for DE, and an HPF circuit 5 for DE connected to the clamping circuit 8 is connected to the adder circuit 8, and also, the clamping circuit 8 is connected to the synchronizing separator circuit 16. At such a case, since the HPF circuit 5 and the limiter circuit 7 of DE system are located at the rear stage side of the clamping circuit 8 and also, the output signal of the clamping circuit 8 is applied on the synchronizing separator circuit 16 via the second LPF circuit 9, it is possible to eliminate the danger of the malfunction of the synchronizing separator circuit 16 due to a noise.

3. 发明专利

JP2007133963A Disk playback device 审中-公开
标题翻译：盘播放器
公开(公告)号：JP2007133963A
公开(公告)日：2007-05-31
申请号：JP2005325907
申请日：2005-11-10
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： OGA TAKAHIRO , AKIYAMA KAZUO
IPC分类号： G11B7/004 , G11B7/005 , G11B7/09 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To provide a disk playback device, wherein an environmental change detecting means is not needed to reduce the number of components and focus servo and tracking servo control can be stabilized to environmental change without producing sound skipping. SOLUTION: Disturbance of a prescribed frequency is applied to focus and tracking servo controlling parts 5 and 6 from a disturbance generating part 18 periodically or when it is decided that servo is instable during servo control and phase difference of signals between before and after application of disturbance is detected by a phase detection part 19. A gain calculating part 28 calculates gain quantities of focus and tracking servo from the detected phase difference and an environmental change deciding part 29 decides presence of environmental change from the calculation result. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种盘重放装置，其中不需要环境变化检测装置来减少部件数量并且聚焦伺服和跟踪伺服控制可以稳定到环境变化而不产生跳跃。
解决方案：施加规定频率的干扰，周期性地或者当伺服控制期间伺服不稳定以及前后信号的相位差时，对来自干扰发生部18的伺服控制部件5和6进行聚焦和跟踪由相位检测部19检测出干扰的施加。增益计算部28根据检测出的相位差计算聚焦跟踪伺服的增益量，环境变化判定部29根据计算结果决定环境变化的存在。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JPH11296856A METHOD AND DEVICE FOR OPTICAL DISK REPRODUCING 失效
公开(公告)号：JPH11296856A
公开(公告)日：1999-10-29
申请号：JP9746898
申请日：1998-04-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： AKIYAMA KAZUO
IPC分类号： G11B7/00 , G11B7/004
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for reproducing optical disk, which is capable of suppressing fluctuation in DO detecting sensitivity caused by the change of data transfer speed. SOLUTION: This device is provided with a pickup 12, an RF amplifier 13, a data slicing part 14, a PLL part 19, a servo control unit 16, a data demodulating part 21, a mechanical driver part 17, a DO detecting part 15 having detecting sensitivity decided by a control voltage corresponding to a data transfer speed and outputting a detecting output assumingly indicating as the existence of dusts or the like on the surface of an optical disk 11 to the servo control unit 16 when the RF signal of the RF amplifier 13 is smaller than a threshold value, and an F/V converter 20 for converting the synchronous clock frequency of the PLL part 19 into a voltage and generating a control voltage corresponding to the data transfer speed.

5. 发明专利

JPH05342590A 失效
公开(公告)号：JPH05342590A
公开(公告)日：1993-12-24
申请号：JP15358492
申请日：1992-06-12
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OZASA MASAYUKI , TAKIGUCHI MASAO , AKIYAMA KAZUO , ENOMOTO YASUHIRO
IPC分类号： G11B7/00 , G11B7/005 , H04B1/04
摘要： PURPOSE:To select one proper amplifier from between two amplifiers whose frequency characteristics are different from each other, and to always obtain a proper frequency characteristic by switching a switcher according to the reproducing state of a signal. CONSTITUTION:This device is equipped with two signal paths whose frequency characteristics are different from each other, the signal path is selected by comparing the signal level of the upper side band with the signal level of the lower side band of a side band appearing in a modulated signal, and the frequency characteristic is appropriately corrected according to the modulated signal. Thus, the device is equipped with two amplifiers 2 and 3 which amplify the modulated signal by the different frequency characteristic, a switcher 4 which selects and outputs one of the output signals of the amplifiers 2 and 3, and a side band detecting means I which individually detects the signal level of the upper side band and the signal level of the lower side band of the side band appearing in the modulated signal at the input side of the amplifiers 2 and 3 to compare them with each other, and controls the switching operation of the switcher according to the compared result.

6. 发明专利

JPH01238281A PICTURE-QUALITY ADJUSTING CIRCUIT 失效
公开(公告)号：JPH01238281A
公开(公告)日：1989-09-22
申请号：JP6357988
申请日：1988-03-18
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： AKIYAMA KAZUO , HAYASHI TAKAHARU , TAMAGAWA NOBUYUKI
IPC分类号： H04N5/208
摘要： PURPOSE:To realize natural contour adjustment by providing a filter circuit which accepts an input luminance signal and which outputs the quadratic differ ential of an input signal, a circuit to adjust the gain of a signal amplitude given from the output of the former, and a circuit which adds/subtracts an output from said adjusting circuit to/from an input luminance signal passed through a phase correction circuit. CONSTITUTION:An input luminance signal coming into an input terminal 1 is supplied to the quadratic differential circuit 2 and to phase correction circuit 4. An output from the circuit 2 is supplied to an amplifier 5 and an inverse amplifier 6, and outputs from those amplifiers is supplied to a selector 7. A control voltage 3(V3) and a reference voltage 9(V5) are compared with each other, and if the result is V3>V5 (picture is sharp), an output from the amplifier 6 is supplied to a gain adjusting circuit 10, but in case V3

7. 发明专利

JPH01235404A FILTER INTEGRATED CIRCUIT 失效
公开(公告)号：JPH01235404A
公开(公告)日：1989-09-20
申请号：JP6032488
申请日：1988-03-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAMAGAWA NOBUYUKI , HAYASHI TAKAHARU , AKIYAMA KAZUO
IPC分类号： H03H11/12 , H01L21/8222 , H01L27/06
摘要： PURPOSE:To change the impedances of diodes, and to absorb fluctuation in a time constant so as to obtain an objective LPF characteristic by using the impedances of the diodes as resistances and adjusting the current values from an external adjustment terminal. CONSTITUTION:In a feedback type LPF circuit consisting of an amplifier 1 which is used as a feedback amplifier, capacitors C1 and C2, the diodes D1 and D2 and variable current source circuits Q3-Q9, the impedances of the diodes D1 and D2 are changed and fluctuation in capacity values and resistance values in a monolithic IC1 can be absorbed by changing the current values of the variable current source circuits Q3-Q9 from the external adjustment terminal 3. Thus, a filter integrated circuit which is suitable to be made into IC can be realized.

8. 发明专利

JPH01168106A FREQUENCY CORRECTION CIRCUIT 失效
公开(公告)号：JPH01168106A
公开(公告)日：1989-07-03
申请号：JP32583887
申请日：1987-12-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAYASHI TAKAHARU , TAMAGAWA NOBUYUKI , AKIYAMA KAZUO
IPC分类号： H03F3/45
摘要： PURPOSE:To select a feedback resistor and a filter circuit and to obtain a desired frequency characteristic and a DC potential by applying DC negative feedback to an amplifier with high gain to transfer the DC component accurately and applying frequency correction by the feedback resistor and the filter circuit. CONSTITUTION:1st and 2nd resistors 3, 5 are connected to the output of 1st and 2nd buffers 2, 4 connected in common to a single input. A frequency correction circuit is constituted by a resistor 7 connected to a 2nd input terminal and an output terminal of a differential amplifier 6 whose 1st input terminal is connected to the 1st resistor and whose 2nd input terminal is connected to the 2nd resistor 5, and a filter circuit 8 whose one terminal is connected to the 2nd input terminal of the differential amplifier 6 and whose other terminal is connected to ground in terms of AC. Since the filter circuit 8 giving a frequency to be corrected is selected freely, the desired frequency characteristic is obtained by selecting the filter circuit. Since the DC negative feedback is applied, the signal DC component is sent accurately to the next stage.

9. 发明专利

JP2005137110A Method and apparatus for controlling disc motor 审中-公开
标题翻译：控制电机的方法和装置
公开(公告)号：JP2005137110A
公开(公告)日：2005-05-26
申请号：JP2003370053
申请日：2003-10-30
申请人： Matsushita Electric Ind Co Ltd , 松下電器産業株式会社
发明人： YAMAMOTO AKIMASA , AKIYAMA KAZUO , MINAGAWA MASANORI
IPC分类号： G11B33/10 , G11B19/28 , H02P5/00 , H02P29/00
摘要： PROBLEM TO BE SOLVED: To avoid loss of control when there is no FG pulse generation circuit or an FG pulse generation circuit gets out of order. SOLUTION: A motor control unit 102 controls and regulates the linear velocity of a disc motor 403 using an FG pulse signal. Using the inputted FG pulse signal, a microcomputer 105 computes the number of revolutions, and compares the result of computation with a target number of revolutions stored in a storage device 103 to determine the presence or absence of an FG pulse generation circuit 404. If there is no FG pulse generation circuit 404, the microcomputer does not carry out constant angular velocity control. Thus, when there is no FG pulse generation circuit 404 or an FG pulse generation circuit 404 is out of order, constant angular velocity control is not carried out. Therefore, the disc motor is prevented from being damaged. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为避免没有FG脉冲发生电路或FG脉冲发生电路出现故障时的控制失控。解决方案：电机控制单元102使用FG脉冲信号来控制和调节盘马达403的线速度。使用输入的FG脉冲信号，微计算机105计算转数，并将计算结果与存储在存储装置103中的目标转数进行比较，以确定FG脉冲生成电路404的存在与否。如果存在没有FG脉冲发生电路404，微型计算机不执行恒定的角速度控制。因此，当没有FG脉冲发生电路404或FG脉冲发生电路404无序时，不执行恒定的角速度控制。因此，防止了盘式电动机的损坏。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JPH05344386A 失效
公开(公告)号：JPH05344386A
公开(公告)日：1993-12-24
申请号：JP14962992
申请日：1992-06-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OZASA MASAYUKI , AKIYAMA KAZUO , ENOMOTO YASUHIRO
IPC分类号： H04N5/208
摘要： PURPOSE:To perform smooth and natural contour emphasizing correction to the contour of images. CONSTITUTION:A video signal passes through the cascade circuit of a high-pass filter 2 and low-pass filters 3 and 4, the output signal of the first filter group is amplified at an amplifier 5 and the video signal passes through the cascade circuit of the high-pass filter 6 and the low-pass filter 7. The output signal of the amplifier 5 and the output signal of the second filter group are added an adder 8 after polarities are adapted and the level of the output signal of the adder 8 is adjusted with a gain controller 9. The video signal is delayed for a prescribed time at a delay device 10 and the output signal of the gain controller 9 and the output signal of the delay device 10 are added at the adder 11 after the polarities are adapted. Since the initial value of an emphasis signal outputted from the gain controller 9 starts from '0', the emphasis signals can be superimposed on the both front and back edges of the delayed video signal almost uniformly.

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